JP5646542B2 - Terminal block capable of detecting electrical circuit abnormalities - Google Patents

Terminal block capable of detecting electrical circuit abnormalities Download PDF

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JP5646542B2
JP5646542B2 JP2012126452A JP2012126452A JP5646542B2 JP 5646542 B2 JP5646542 B2 JP 5646542B2 JP 2012126452 A JP2012126452 A JP 2012126452A JP 2012126452 A JP2012126452 A JP 2012126452A JP 5646542 B2 JP5646542 B2 JP 5646542B2
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terminal block
circuit
terminal
electric circuit
phase
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JP2013252020A (en
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吉田　敦至
敦至 吉田
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河村電器産業株式会社
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本発明は、接続不良や導通不良などの異常を検出する機能を備えた端子台に関する。   The present invention relates to a terminal block having a function of detecting an abnormality such as a connection failure or a conduction failure.

例えば、分電盤の内部には、ブレーカや端子台等の複数の電気機器が設けられ、共通の電源に接続されている。これらの電気機器は、端子部にネジを使用しているため、ネジの緩みで接続不良が発生し、発熱の原因となりやすい。そこで、従来、端子部の接続不良を検出するための回路を電気機器に内蔵した技術が提案されている。例えば、特許文献１に記載されたブレーカは、端子部のネジと電源座とにセンサ回路を接続し、センサ回路の出力に基づいて端子部の接続不良を検出できるように構成されている。   For example, a plurality of electrical devices such as breakers and terminal blocks are provided inside the distribution board and connected to a common power source. Since these electric devices use screws in the terminal portion, loose connection of the screws causes connection failure, which is likely to cause heat generation. Therefore, conventionally, a technique has been proposed in which a circuit for detecting a connection failure in a terminal portion is built in an electric device. For example, the breaker described in Patent Document 1 is configured to connect a sensor circuit to a screw of a terminal portion and a power supply seat and detect a connection failure of the terminal portion based on the output of the sensor circuit.

特開２００９−２４５８３６号公報JP 2009-245836 A

ところで、ブレーカの端子部は電源側と負荷側にそれぞれ複数設けられており、また、分電盤には、ブレーカの他に、端子台や銅バーなどネジを用いた多数の端子部が設けられ、端子部の他にも、ブレーカの内部接点やリード線など導通不良の可能性がある電気接続部が各所に散在する。このため、従来技術によると、接続不良や導通不良を検出するために、多数の電気接続部にセンサ回路を設ける必要があり、電路の構成が複雑になるという問題点があった。   By the way, there are a plurality of breaker terminal sections on the power supply side and load side, and the distribution board is provided with a number of terminal sections using screws such as terminal blocks and copper bars in addition to the breaker. In addition to the terminal portions, there are scattered electrical connection portions such as internal contacts and lead wires of the breaker that may have poor conduction. For this reason, according to the prior art, in order to detect a connection failure or a conduction failure, it is necessary to provide sensor circuits in a large number of electrical connection portions, and there is a problem that the configuration of the electric circuit becomes complicated.

そこで、本発明の目的は、接続不良や導通不良などの異常を電路の一箇所で検出し、ユーザーに報知できる端子台を提供することにある。   Therefore, an object of the present invention is to provide a terminal block that can detect an abnormality such as a connection failure or a conduction failure at one place on an electric circuit and notify the user of the abnormality.

上記課題を解決するために、本発明は、複数の電気機器を含む電路上に設けられる端子台において、次のような手段を提供する。
（１）電路を単相３線式電路として、端子台のハウジングに、単相３線式電路に接続される複数の端子部と、該端子部のうち単相３線式電路を構成する２つの電源線に接続された同じ極性の２つの端子部の電位差を検知するセンサ回路と、センサ回路の出力に基づいて単相３線式電路の異常を検出する検出回路と、検出回路からの指令に応答して警報を発生する警報器とを設けたことを特徴とする端子台。 In order to solve the above problems, the present invention provides the following means in a terminal block provided on an electric circuit including a plurality of electric devices.
(1) The electric circuit is a single-phase three-wire electric circuit, a plurality of terminal portions connected to the single-phase three-wire electric circuit in the terminal block housing, and a single-phase three-wire electric circuit among the terminal portions is configured 2 A sensor circuit for detecting a potential difference between two terminal portions of the same polarity connected to one power line, a detection circuit for detecting an abnormality in a single-phase three-wire circuit based on the output of the sensor circuit, and a command from the detection circuit A terminal block provided with an alarm device that generates an alarm in response to the alarm.

（２）警報器がブザーを含み、ハウジングがブザーを停止させるためのボタンを備えたことを特徴とする端子台。 (2) A terminal block, wherein the alarm device includes a buzzer and the housing includes a button for stopping the buzzer.

本発明によれば、端子台にセンサ回路を設けたので、端子台より上流側の電路上に存在する多数の電気接続部の不良、不通を端子台の設置場所で一括して検出し、警報器でユーザーに報知できるという効果がある。   According to the present invention, since the sensor circuit is provided in the terminal block, a number of defective electrical connections on the electrical circuit upstream from the terminal block are detected at the installation location of the terminal block. There is an effect that it can be notified to the user with a vessel.

本発明の一実施形態を示す分電盤の機器配置図である。It is an equipment layout diagram of a distribution board showing one embodiment of the present invention. 図１の分電盤の端子台を示す正面および底面図である。It is the front and bottom view which show the terminal block of the distribution board of FIG. 図２の端子台を含む分電盤の配線図である。FIG. 3 is a wiring diagram of a distribution board including the terminal block of FIG. 2.

以下、本発明を単相３線式電路上の端子台に具体化した一実施形態を図面に基づいて説明する。図１に示す分電盤１は、筐体２の内側に支持枠３を備え、支持枠３の上に主幹ブレーカ４、分岐ブレーカ５、端子台６を装備している。主幹ブレーカ４の電源側端子部４ａには電源線７が接続され、主幹ブレーカ４の負荷側端子部４ｂと分岐ブレーカ５の電源側端子部５ａとの間に銅バー８が接続され、分岐ブレーカ５の負荷側端子部５ｂと端子台６の電源側端子部６ａとの間にリード線９が配線され、端子台６の負荷側端子部６ｂに負荷配線１０が接続されている。   Hereinafter, an embodiment in which the present invention is embodied in a terminal block on a single-phase three-wire circuit will be described with reference to the drawings. A distribution board 1 shown in FIG. 1 includes a support frame 3 inside a housing 2, and a main breaker 4, a branch breaker 5, and a terminal block 6 are mounted on the support frame 3. A power supply line 7 is connected to the power supply side terminal portion 4a of the main breaker 4, and a copper bar 8 is connected between the load side terminal portion 4b of the main breaker 4 and the power supply side terminal portion 5a of the branch breaker 5, and the branch breaker. The lead wire 9 is wired between the load side terminal portion 5 b of the power source terminal 5 b and the power source side terminal portion 6 a of the terminal block 6, and the load wiring 10 is connected to the load side terminal portion 6 b of the terminal block 6.

図２（ａ），（ｂ）に示すように、端子台６は長尺のハウジング１１を備え、ハウジング１１の表面に電源側端子部６ａと負荷側端子部６ｂとがそれぞれ複数配列されている。ハウジング１１の内部には、センサ回路１２、検出回路１３、通信回路１８、外部接続端子１９（それぞれ図３参照）を備えた回路基板１４と、警報ブザー１５とが設けられている。警報ブザー１５はハウジング１１の一端部に内蔵され、ハウジング１１の一端部表面に、警報ブザー１５の鳴動を停止させるためのリセットボタン１６と警報ランプ１７とが配設されている。   As shown in FIGS. 2A and 2B, the terminal block 6 includes a long housing 11, and a plurality of power-side terminal portions 6 a and load-side terminal portions 6 b are arranged on the surface of the housing 11. . Inside the housing 11, a circuit board 14 having a sensor circuit 12, a detection circuit 13, a communication circuit 18, an external connection terminal 19 (see FIG. 3 respectively), and an alarm buzzer 15 are provided. The alarm buzzer 15 is built in one end of the housing 11, and a reset button 16 and an alarm lamp 17 for stopping the sounding of the alarm buzzer 15 are disposed on the surface of one end of the housing 11.

図３に示すように、端子台６の隣接する２つの端子部６ａ，６ｂは、リード線９によって極性の異なる電路（Ｌ１とＮまたはＮとＬ２）に接続されている。複数のセンサ回路１２は、それぞれ、一つ置きに二つの負荷側端子部６ｂに接続され、同じ極性（Ｌ１とＬ１、ＮとＮ、Ｌ２とＬ２）の二つの端子部６ｂの電位差を検知する。そして、検出回路１３が、各センサ回路１２の出力に基づき、電路の異常を検出し、ブザー１５とランプ１７に警報指令を出力するとともに、通信回路１８に盤外向けの警報通知指令を出力するように構成されている。   As shown in FIG. 3, the two adjacent terminal portions 6 a and 6 b of the terminal block 6 are connected to electric circuits (L 1 and N or N and L 2) having different polarities by lead wires 9. Each of the plurality of sensor circuits 12 is connected to every other two load side terminal portions 6b and detects the potential difference between the two terminal portions 6b having the same polarity (L1 and L1, N and N, L2 and L2). . The detection circuit 13 detects an abnormality in the electric circuit based on the output of each sensor circuit 12, outputs an alarm command to the buzzer 15 and the lamp 17, and outputs an alarm notification command for the outside of the panel to the communication circuit 18. It is configured as follows.

上記構成の分電盤１において、主幹ブレーカ４よりも下流側の銅バー８、分岐ブレーカ５、端子台６を含む３本の電路（電圧線Ｌ１，Ｌ２、中性線Ｎ）の何処かで、端子部またはネジ接続部に接続不良が発生したり、分岐ブレーカ５の内部接点５ｃまたはリード線９に導通不良や断線が発生したりすると、センサ回路１２がその電路に接続された同極性の２つの端子部６ｂの異常電位差を検知し、検出回路１３が警報指令を出力し、ブザー１５が鳴動し、ランプ１７が点灯し、電路の異常がユーザーに報知される。したがって、分電盤１の末端機器である一つの端子台６により、その端子台６を含み主幹ブレーカ４に至るまでの電路異常を簡単な構成で的確に検出することができる。   In the distribution board 1 having the above-described configuration, somewhere in three electric circuits (voltage lines L1, L2, neutral line N) including the copper bar 8, the branch breaker 5, and the terminal block 6 on the downstream side of the main breaker 4. If a connection failure occurs in the terminal portion or screw connection portion, or a continuity failure or disconnection occurs in the internal contact 5c or the lead wire 9 of the branch breaker 5, the sensor circuit 12 of the same polarity connected to the electric circuit is connected. The abnormal potential difference between the two terminal portions 6b is detected, the detection circuit 13 outputs an alarm command, the buzzer 15 sounds, the lamp 17 is lit, and the user is notified of the electric circuit abnormality. Therefore, the single terminal block 6 which is the terminal device of the distribution board 1 can accurately detect an electric circuit abnormality including the terminal block 6 and reaching the main breaker 4 with a simple configuration.

なお、本発明の端子台６は、分電盤１に限定されず、操作盤や制御盤等の電気機器収納盤内に設置できるほか、コンセントや配電機器等の電気機器接続器具に付設することもできる。その他、本発明は、上記実施形態に限定されるもではなく、発明の趣旨を逸脱しない範囲で、各部の構成を適宜変更して実施することも可能である。   The terminal block 6 of the present invention is not limited to the distribution board 1 and can be installed in an electrical equipment storage panel such as an operation panel or a control panel, or attached to an electrical equipment connection device such as an outlet or a power distribution equipment. You can also. In addition, the present invention is not limited to the above embodiment, and can be implemented by appropriately changing the configuration of each part without departing from the spirit of the invention.

１ 分電盤
４ 主幹ブレーカ
５ 分岐ブレーカ
６ 端子台
６ａ，６ｂ 端子部
８ 銅バー
１１ ハウジング
１２ センサ回路
１３ 検出回路
１５ 警報ブザー
１６ リセットボタン
１７ 警報ランプ 1 Distribution board 4 Main breaker 5 Branch breaker 6 Terminal block 6a, 6b Terminal block 8 Copper bar 11 Housing 12 Sensor circuit 13 Detection circuit 15 Alarm buzzer 16 Reset button 17 Alarm lamp

Claims (2)

複数の電気機器を含む電路上に設けられる端子台において、前記電路を単相３線式電路として、該端子台のハウジングに、前記単相３線式電路に接続される複数の端子部と、該端子部のうち前記単相３線式電路を構成する２つの電源線に接続された同じ極性の２つの端子部の電位差を検知するセンサ回路と、センサ回路の出力に基づいて前記単相３線式電路の異常を検出する検出回路と、検出回路からの指令に応答して警報を発生する警報器とを設けたことを特徴とする端子台。 In a terminal block provided on an electric circuit including a plurality of electric devices, the electric circuit is a single-phase three-wire electric circuit, a housing of the terminal block, a plurality of terminal portions connected to the single-phase three-wire electric circuit, A sensor circuit for detecting a potential difference between two terminal portions having the same polarity connected to two power supply lines constituting the single-phase three-wire circuit among the terminal portions, and the single-phase 3 based on an output of the sensor circuit. A terminal block comprising a detection circuit for detecting an abnormality in a wire electric circuit and an alarm device for generating an alarm in response to a command from the detection circuit. 前記警報器がブザーを含み、前記ハウジングがブザーを停止させるためのボタンを備えたことを特徴とする請求項１に記載の端子台。 The terminal block according to claim 1, wherein the alarm device includes a buzzer, and the housing includes a button for stopping the buzzer.
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